Electronic Principles Suppose a step-down transformer has a turns ration of 5:1. If the secondary current is 1A rms, what is the primary-current? 0.6 A 0.4 A None of these 0.3 A 0.2 A 0.6 A 0.4 A None of these 0.3 A 0.2 A ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A certain electromagnet has 1000 turns of wire. How much current must flow through the coil in order to generate an mmf of 100 ampere-turns? 0.1 A 0.41666666666667 None of these 100 A 1000 A 0.1 A 0.41666666666667 None of these 100 A 1000 A ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A step-up transformer has a turns ratio of 1:4. If the line voltage is 115 V rms, what is the peak secondary voltage? 700 V 651 V 707 V None of these 208 V 700 V 651 V 707 V None of these 208 V ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The rms value of a sine waveform is: equal to 0.707 times the peak amplitude the time required to complete one full cycle equal to 1.41 times the peak amplitude the number of cycles completed in one second None of these equal to 0.707 times the peak amplitude the time required to complete one full cycle equal to 1.41 times the peak amplitude the number of cycles completed in one second None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is the impedance of a circuit composed of a 100 ohm resistor connected in parallel with an inductor that has a reactance of 200 W? 77.7 ohm 89.3 ohm None of these 88.8 ohm 224 ohm 77.7 ohm 89.3 ohm None of these 88.8 ohm 224 ohm ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following properties of a magnetic circuit can be directly compared to resistance in an electrical circuit? There is no valid comparison Permeance Retentivity Permeability Reluctance There is no valid comparison Permeance Retentivity Permeability Reluctance ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS